Check protoc and grpc_cpp_plugin
diff --git a/tools/codegen/extensions/gen_reflection_proto.sh b/tools/codegen/extensions/gen_reflection_proto.sh
index d552728..db99755 100755
--- a/tools/codegen/extensions/gen_reflection_proto.sh
+++ b/tools/codegen/extensions/gen_reflection_proto.sh
@@ -29,21 +29,40 @@
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+set -e
+cd $(dirname $0)/../../..
+
PROTO_DIR="src/proto/grpc/reflection/v1alpha"
PROTO_FILE="reflection"
HEADER_DIR="include/grpc++/ext"
SRC_DIR="src/cpp/ext"
INCLUDE_DIR="grpc++/ext"
TMP_DIR="tmp"
-GRPC_PLUGIN="bins/opt/grpc_cpp_plugin"
-PROTOC="bins/opt/protobuf/protoc"
-set -e
+if hash grpc_cpp_plugin 2>/dev/null; then
+ GRPC_PLUGIN=$(which grpc_cpp_plugin)
+else
+ if [ -f bins/opt/grpc_cpp_plugin ]; then
+ GRPC_PLUGIN="bins/opt/grpc_cpp_plugin"
+ else
+ echo "gRPC protoc plugin not found"
+ exit 1
+ fi
+fi
+
+if hash protoc 2>/dev/null; then
+ PROTOC=$(which protoc)
+else
+ if [ -f bins/opt/protobuf/protoc ]; then
+ PROTOC="bins/opt/protobuf/protoc"
+ else
+ echo "protoc not found"
+ exit 1
+ fi
+fi
TMP_DIR=${TMP_DIR}_${PROTO_FILE}
-cd $(dirname $0)/../../..
-
[ ! -d $HEADER_DIR ] && mkdir -p $HEADER_DIR || :
[ ! -d $SRC_DIR ] && mkdir -p $SRC_DIR || :
[ ! -d $TMP_DIR ] && mkdir -p $TMP_DIR || :